merge

1 files changed, 7 insertions, 2 deletions

diff --git a/sql/ha_partition.cc b/sql/ha_partition.cc
index 785d118a5f4..5e23891247d 100644
--- a/sql/ha_partition.cc
+++ b/sql/ha_partition.cc
@@ -3456,9 +3456,13 @@ exit:
     index)
     mysql_update does not set table->next_number_field, so we use
     table->found_next_number_field instead.
+    Also checking that the field is marked in the write set.
   */
-  if (table->found_next_number_field && new_data == table->record[0] &&
-      !table->s->next_number_keypart)
+  if (table->found_next_number_field &&
+      new_data == table->record[0] &&
+      !table->s->next_number_keypart &&
+      bitmap_is_set(table->write_set,
+                    table->found_next_number_field->field_index))
   {
     if (!table_share->ha_part_data->auto_inc_initialized)
       info(HA_STATUS_AUTO);
@@ -4110,6 +4114,7 @@ void ha_partition::position(const uchar *record)
 void ha_partition::column_bitmaps_signal()
 {
     handler::column_bitmaps_signal();
+    /* Must read all partition fields to make position() call possible */
     bitmap_union(table->read_set, &m_part_info->full_part_field_set);
 }